Focal Point Behind Subject


OPTICAL LAYOUT shows how the camera determines where the focal plane is. Separator lenses create two identical images, each of which falls on half a pair of CCD sensor arrays. When these points of light are a set distance apart, the subject is in focus. When the separation is too small (middle panel), the focus is in front of the subject. When it is too large, the focus is behind the subject.

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Guide to Alternative Fuels

Guide to Alternative Fuels

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